instrument over his and her clothes and get rid of even the little dust existing--for we shall be more and more intolerant of dirt in any form, having by that time fully realised how dangerous dirt is. The new age will be a clean age. A lady of the year 2000 who could be miraculously transported back to London at the present moment would probably faint (they will not have ceased fainting) at the intolerable disgustingness of what is, I suppose, now one of the cleanest cities in the world, even if the cruelty of employing horses for traction, and the frightful recklessness of allowing them to soil the streets in which people walk, did not overpower her susceptibilities in another way. Cooking will perhaps not be done at all on any large scale at home, in flat-homes at all events; and in any case, for reasons which will hereafter become apparent, cooking will be a much less disgusting process than it is to-day. In no case will the domestic servant of a hundred years hence be called upon to stand over a roaring fire, laid by herself, and to be cleaned up by herself when done with, in order to cook the family dinner. Every measure of heat--controllable in gradations of ten degrees or so--will be furnished in electrically-fitted receptacles, with or without water jackets or steam jackets: and unquestionably all cooking will be done in hermetically-closed vessels. We shall not much longer do most of our cooking by such a wasteful and unwholesome method as boiling, whereby the important soluble salts of nearly all food are callously thrown away. As, for reasons to be developed hereafter, it is quite certain that animal food will have been wholly abandoned before the end of this century, the débris of the kitchen will be much more manageable than at present, and the kitchen sink will cease to be, during a great part of the day, a place of unapproachable loathsomeness. On the other hand, its conveniences will have been greatly increased. It is difficult to understand how the old-world fashion of (for instance) "washing up" plates and dishes can have endured so long. Of course, in the new age, these utensils will be simply dropped one by one into an automatic receptacle; swilled clean by water delivered with force and charged with nascent oxygen; dried by electric heat; and polished by electric force; being finally oxygen-bathed as a superfluous act of sanitary cleanliness before being sent to table again. And all that has come off the plates will drop through the scullery floor into the destructor beneath to be oxygenated and made away with.